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c44af4eb TT |
1 | /* Rust language support routines for GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
c44af4eb TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | ||
22 | #include <ctype.h> | |
23 | ||
24 | #include "block.h" | |
25 | #include "c-lang.h" | |
26 | #include "charset.h" | |
27 | #include "cp-support.h" | |
8b302db8 | 28 | #include "demangle.h" |
c44af4eb TT |
29 | #include "gdbarch.h" |
30 | #include "infcall.h" | |
31 | #include "objfiles.h" | |
71a3c369 | 32 | #include "psymtab.h" |
c44af4eb | 33 | #include "rust-lang.h" |
a33ccfc7 | 34 | #include "typeprint.h" |
c44af4eb TT |
35 | #include "valprint.h" |
36 | #include "varobj.h" | |
a33ccfc7 | 37 | #include <algorithm> |
ab8b80a8 TT |
38 | #include <string> |
39 | #include <vector> | |
7f6aba03 | 40 | #include "cli/cli-style.h" |
c44af4eb | 41 | |
c9317f21 | 42 | /* See rust-lang.h. */ |
c44af4eb | 43 | |
c9317f21 TT |
44 | const char * |
45 | rust_last_path_segment (const char *path) | |
c44af4eb TT |
46 | { |
47 | const char *result = strrchr (path, ':'); | |
48 | ||
49 | if (result == NULL) | |
c9317f21 | 50 | return path; |
c44af4eb TT |
51 | return result + 1; |
52 | } | |
53 | ||
03c85b11 | 54 | /* See rust-lang.h. */ |
c44af4eb | 55 | |
03c85b11 | 56 | std::string |
c44af4eb TT |
57 | rust_crate_for_block (const struct block *block) |
58 | { | |
59 | const char *scope = block_scope (block); | |
60 | ||
61 | if (scope[0] == '\0') | |
03c85b11 | 62 | return std::string (); |
c44af4eb | 63 | |
03c85b11 | 64 | return std::string (scope, cp_find_first_component (scope)); |
c44af4eb TT |
65 | } |
66 | ||
c9317f21 TT |
67 | /* Return true if TYPE, which must be a struct type, represents a Rust |
68 | enum. */ | |
c44af4eb | 69 | |
b96645f1 | 70 | static bool |
9c6a1327 | 71 | rust_enum_p (struct type *type) |
b96645f1 | 72 | { |
9c6a1327 TT |
73 | /* is_dynamic_type will return true if any field has a dynamic |
74 | attribute -- but we only want to check the top level. */ | |
75 | return TYPE_HAS_VARIANT_PARTS (type); | |
b96645f1 MG |
76 | } |
77 | ||
9c6a1327 TT |
78 | /* Return true if TYPE, which must be an already-resolved enum type, |
79 | has no variants. */ | |
098b2108 TT |
80 | |
81 | static bool | |
82 | rust_empty_enum_p (const struct type *type) | |
83 | { | |
1f704f76 | 84 | return type->num_fields () == 0; |
098b2108 TT |
85 | } |
86 | ||
9c6a1327 TT |
87 | /* Given an already-resolved enum type and contents, find which |
88 | variant is active. */ | |
c44af4eb | 89 | |
9c6a1327 TT |
90 | static int |
91 | rust_enum_variant (struct type *type) | |
c44af4eb | 92 | { |
9c6a1327 | 93 | /* The active variant is simply the first non-artificial field. */ |
1f704f76 | 94 | for (int i = 0; i < type->num_fields (); ++i) |
9c6a1327 TT |
95 | if (!TYPE_FIELD_ARTIFICIAL (type, i)) |
96 | return i; | |
c44af4eb | 97 | |
9c6a1327 TT |
98 | /* Perhaps we could get here by trying to print an Ada variant |
99 | record in Rust mode. Unlikely, but an error is safer than an | |
100 | assert. */ | |
101 | error (_("Could not find active enum variant")); | |
c44af4eb TT |
102 | } |
103 | ||
104 | /* See rust-lang.h. */ | |
105 | ||
65c40c95 | 106 | bool |
c44af4eb TT |
107 | rust_tuple_type_p (struct type *type) |
108 | { | |
109 | /* The current implementation is a bit of a hack, but there's | |
110 | nothing else in the debuginfo to distinguish a tuple from a | |
111 | struct. */ | |
78134374 | 112 | return (type->code () == TYPE_CODE_STRUCT |
7d93a1e0 SM |
113 | && type->name () != NULL |
114 | && type->name ()[0] == '('); | |
c44af4eb TT |
115 | } |
116 | ||
c44af4eb | 117 | /* Return true if all non-static fields of a structlike type are in a |
c9317f21 | 118 | sequence like __0, __1, __2. */ |
c44af4eb | 119 | |
65c40c95 | 120 | static bool |
c9317f21 | 121 | rust_underscore_fields (struct type *type) |
c44af4eb TT |
122 | { |
123 | int i, field_number; | |
124 | ||
125 | field_number = 0; | |
126 | ||
78134374 | 127 | if (type->code () != TYPE_CODE_STRUCT) |
65c40c95 | 128 | return false; |
1f704f76 | 129 | for (i = 0; i < type->num_fields (); ++i) |
c44af4eb | 130 | { |
ceacbf6e | 131 | if (!field_is_static (&type->field (i))) |
c44af4eb | 132 | { |
c9317f21 | 133 | char buf[20]; |
c44af4eb | 134 | |
c9317f21 TT |
135 | xsnprintf (buf, sizeof (buf), "__%d", field_number); |
136 | if (strcmp (buf, TYPE_FIELD_NAME (type, i)) != 0) | |
137 | return false; | |
138 | field_number++; | |
c44af4eb TT |
139 | } |
140 | } | |
65c40c95 | 141 | return true; |
c44af4eb TT |
142 | } |
143 | ||
144 | /* See rust-lang.h. */ | |
145 | ||
65c40c95 | 146 | bool |
c44af4eb TT |
147 | rust_tuple_struct_type_p (struct type *type) |
148 | { | |
12df5c00 TT |
149 | /* This is just an approximation until DWARF can represent Rust more |
150 | precisely. We exclude zero-length structs because they may not | |
151 | be tuple structs, and there's no way to tell. */ | |
1f704f76 | 152 | return type->num_fields () > 0 && rust_underscore_fields (type); |
c44af4eb TT |
153 | } |
154 | ||
155 | /* Return true if TYPE is a slice type, otherwise false. */ | |
156 | ||
65c40c95 | 157 | static bool |
c44af4eb TT |
158 | rust_slice_type_p (struct type *type) |
159 | { | |
78134374 | 160 | return (type->code () == TYPE_CODE_STRUCT |
7d93a1e0 SM |
161 | && type->name () != NULL |
162 | && (strncmp (type->name (), "&[", 2) == 0 | |
163 | || strcmp (type->name (), "&str") == 0)); | |
c44af4eb TT |
164 | } |
165 | ||
166 | /* Return true if TYPE is a range type, otherwise false. */ | |
167 | ||
65c40c95 | 168 | static bool |
c44af4eb TT |
169 | rust_range_type_p (struct type *type) |
170 | { | |
171 | int i; | |
172 | ||
78134374 | 173 | if (type->code () != TYPE_CODE_STRUCT |
1f704f76 | 174 | || type->num_fields () > 2 |
7d93a1e0 SM |
175 | || type->name () == NULL |
176 | || strstr (type->name (), "::Range") == NULL) | |
65c40c95 | 177 | return false; |
c44af4eb | 178 | |
1f704f76 | 179 | if (type->num_fields () == 0) |
65c40c95 | 180 | return true; |
c44af4eb TT |
181 | |
182 | i = 0; | |
183 | if (strcmp (TYPE_FIELD_NAME (type, 0), "start") == 0) | |
184 | { | |
1f704f76 | 185 | if (type->num_fields () == 1) |
65c40c95 | 186 | return true; |
c44af4eb TT |
187 | i = 1; |
188 | } | |
1f704f76 | 189 | else if (type->num_fields () == 2) |
c44af4eb TT |
190 | { |
191 | /* First field had to be "start". */ | |
65c40c95 | 192 | return false; |
c44af4eb TT |
193 | } |
194 | ||
195 | return strcmp (TYPE_FIELD_NAME (type, i), "end") == 0; | |
196 | } | |
197 | ||
6873858b TT |
198 | /* Return true if TYPE is an inclusive range type, otherwise false. |
199 | This is only valid for types which are already known to be range | |
200 | types. */ | |
201 | ||
202 | static bool | |
203 | rust_inclusive_range_type_p (struct type *type) | |
204 | { | |
7d93a1e0 SM |
205 | return (strstr (type->name (), "::RangeInclusive") != NULL |
206 | || strstr (type->name (), "::RangeToInclusive") != NULL); | |
6873858b TT |
207 | } |
208 | ||
c44af4eb TT |
209 | /* Return true if TYPE seems to be the type "u8", otherwise false. */ |
210 | ||
65c40c95 | 211 | static bool |
c44af4eb TT |
212 | rust_u8_type_p (struct type *type) |
213 | { | |
78134374 | 214 | return (type->code () == TYPE_CODE_INT |
c44af4eb TT |
215 | && TYPE_UNSIGNED (type) |
216 | && TYPE_LENGTH (type) == 1); | |
217 | } | |
218 | ||
219 | /* Return true if TYPE is a Rust character type. */ | |
220 | ||
65c40c95 | 221 | static bool |
c44af4eb TT |
222 | rust_chartype_p (struct type *type) |
223 | { | |
78134374 | 224 | return (type->code () == TYPE_CODE_CHAR |
c44af4eb TT |
225 | && TYPE_LENGTH (type) == 4 |
226 | && TYPE_UNSIGNED (type)); | |
227 | } | |
228 | ||
4be290b2 AB |
229 | /* Return true if TYPE is a string type. */ |
230 | ||
231 | static bool | |
232 | rust_is_string_type_p (struct type *type) | |
233 | { | |
234 | LONGEST low_bound, high_bound; | |
235 | ||
236 | type = check_typedef (type); | |
78134374 SM |
237 | return ((type->code () == TYPE_CODE_STRING) |
238 | || (type->code () == TYPE_CODE_PTR | |
239 | && (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_ARRAY | |
4be290b2 AB |
240 | && rust_u8_type_p (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (type))) |
241 | && get_array_bounds (TYPE_TARGET_TYPE (type), &low_bound, | |
242 | &high_bound))) | |
78134374 | 243 | || (type->code () == TYPE_CODE_STRUCT |
4be290b2 AB |
244 | && !rust_enum_p (type) |
245 | && rust_slice_type_p (type) | |
7d93a1e0 | 246 | && strcmp (type->name (), "&str") == 0)); |
4be290b2 AB |
247 | } |
248 | ||
71a3c369 TT |
249 | /* If VALUE represents a trait object pointer, return the underlying |
250 | pointer with the correct (i.e., runtime) type. Otherwise, return | |
251 | NULL. */ | |
252 | ||
253 | static struct value * | |
254 | rust_get_trait_object_pointer (struct value *value) | |
255 | { | |
256 | struct type *type = check_typedef (value_type (value)); | |
257 | ||
1f704f76 | 258 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) |
71a3c369 TT |
259 | return NULL; |
260 | ||
261 | /* Try to be a bit resilient if the ABI changes. */ | |
262 | int vtable_field = 0; | |
263 | for (int i = 0; i < 2; ++i) | |
264 | { | |
265 | if (strcmp (TYPE_FIELD_NAME (type, i), "vtable") == 0) | |
266 | vtable_field = i; | |
267 | else if (strcmp (TYPE_FIELD_NAME (type, i), "pointer") != 0) | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | CORE_ADDR vtable = value_as_address (value_field (value, vtable_field)); | |
272 | struct symbol *symbol = find_symbol_at_address (vtable); | |
cf724bc9 | 273 | if (symbol == NULL || symbol->subclass != SYMBOL_RUST_VTABLE) |
71a3c369 TT |
274 | return NULL; |
275 | ||
276 | struct rust_vtable_symbol *vtable_sym | |
277 | = static_cast<struct rust_vtable_symbol *> (symbol); | |
278 | struct type *pointer_type = lookup_pointer_type (vtable_sym->concrete_type); | |
279 | return value_cast (pointer_type, value_field (value, 1 - vtable_field)); | |
280 | } | |
281 | ||
c44af4eb TT |
282 | \f |
283 | ||
284 | /* la_emitchar implementation for Rust. */ | |
285 | ||
286 | static void | |
287 | rust_emitchar (int c, struct type *type, struct ui_file *stream, int quoter) | |
288 | { | |
289 | if (!rust_chartype_p (type)) | |
290 | generic_emit_char (c, type, stream, quoter, | |
291 | target_charset (get_type_arch (type))); | |
292 | else if (c == '\\' || c == quoter) | |
293 | fprintf_filtered (stream, "\\%c", c); | |
294 | else if (c == '\n') | |
295 | fputs_filtered ("\\n", stream); | |
296 | else if (c == '\r') | |
297 | fputs_filtered ("\\r", stream); | |
298 | else if (c == '\t') | |
299 | fputs_filtered ("\\t", stream); | |
300 | else if (c == '\0') | |
301 | fputs_filtered ("\\0", stream); | |
302 | else if (c >= 32 && c <= 127 && isprint (c)) | |
303 | fputc_filtered (c, stream); | |
304 | else if (c <= 255) | |
305 | fprintf_filtered (stream, "\\x%02x", c); | |
306 | else | |
307 | fprintf_filtered (stream, "\\u{%06x}", c); | |
308 | } | |
309 | ||
310 | /* la_printchar implementation for Rust. */ | |
311 | ||
312 | static void | |
313 | rust_printchar (int c, struct type *type, struct ui_file *stream) | |
314 | { | |
315 | fputs_filtered ("'", stream); | |
316 | LA_EMIT_CHAR (c, type, stream, '\''); | |
317 | fputs_filtered ("'", stream); | |
318 | } | |
319 | ||
320 | /* la_printstr implementation for Rust. */ | |
321 | ||
322 | static void | |
323 | rust_printstr (struct ui_file *stream, struct type *type, | |
324 | const gdb_byte *string, unsigned int length, | |
325 | const char *user_encoding, int force_ellipses, | |
326 | const struct value_print_options *options) | |
327 | { | |
328 | /* Rust always uses UTF-8, but let the caller override this if need | |
329 | be. */ | |
330 | const char *encoding = user_encoding; | |
331 | if (user_encoding == NULL || !*user_encoding) | |
332 | { | |
333 | /* In Rust strings, characters are "u8". */ | |
334 | if (rust_u8_type_p (type)) | |
335 | encoding = "UTF-8"; | |
336 | else | |
337 | { | |
338 | /* This is probably some C string, so let's let C deal with | |
339 | it. */ | |
340 | c_printstr (stream, type, string, length, user_encoding, | |
341 | force_ellipses, options); | |
342 | return; | |
343 | } | |
344 | } | |
345 | ||
346 | /* This is not ideal as it doesn't use our character printer. */ | |
347 | generic_printstr (stream, type, string, length, encoding, force_ellipses, | |
348 | '"', 0, options); | |
349 | } | |
350 | ||
351 | \f | |
352 | ||
5f56f7cb TT |
353 | static void rust_value_print_inner (struct value *val, struct ui_file *stream, |
354 | int recurse, | |
355 | const struct value_print_options *options); | |
356 | ||
45320ffa TT |
357 | /* Helper function to print a string slice. */ |
358 | ||
359 | static void | |
360 | rust_val_print_str (struct ui_file *stream, struct value *val, | |
361 | const struct value_print_options *options) | |
362 | { | |
363 | struct value *base = value_struct_elt (&val, NULL, "data_ptr", NULL, | |
364 | "slice"); | |
365 | struct value *len = value_struct_elt (&val, NULL, "length", NULL, "slice"); | |
366 | ||
367 | val_print_string (TYPE_TARGET_TYPE (value_type (base)), "UTF-8", | |
368 | value_as_address (base), value_as_long (len), stream, | |
369 | options); | |
370 | } | |
371 | ||
c9317f21 | 372 | /* rust_val_print helper for structs and untagged unions. */ |
b96645f1 MG |
373 | |
374 | static void | |
5f56f7cb | 375 | val_print_struct (struct value *val, struct ui_file *stream, int recurse, |
20955dbf | 376 | const struct value_print_options *options) |
b96645f1 MG |
377 | { |
378 | int i; | |
379 | int first_field; | |
5f56f7cb | 380 | struct type *type = check_typedef (value_type (val)); |
45320ffa | 381 | |
7d93a1e0 | 382 | if (rust_slice_type_p (type) && strcmp (type->name (), "&str") == 0) |
45320ffa | 383 | { |
80062eb9 AB |
384 | /* If what we are printing here is actually a string within a |
385 | structure then VAL will be the original parent value, while TYPE | |
386 | will be the type of the structure representing the string we want | |
387 | to print. | |
388 | However, RUST_VAL_PRINT_STR looks up the fields of the string | |
389 | inside VAL, assuming that VAL is the string. | |
390 | So, recreate VAL as a value representing just the string. */ | |
5f56f7cb | 391 | val = value_at_lazy (type, value_address (val)); |
45320ffa TT |
392 | rust_val_print_str (stream, val, options); |
393 | return; | |
394 | } | |
395 | ||
65c40c95 TT |
396 | bool is_tuple = rust_tuple_type_p (type); |
397 | bool is_tuple_struct = !is_tuple && rust_tuple_struct_type_p (type); | |
b96645f1 MG |
398 | struct value_print_options opts; |
399 | ||
400 | if (!is_tuple) | |
401 | { | |
7d93a1e0 SM |
402 | if (type->name () != NULL) |
403 | fprintf_filtered (stream, "%s", type->name ()); | |
b96645f1 | 404 | |
1f704f76 | 405 | if (type->num_fields () == 0) |
b96645f1 MG |
406 | return; |
407 | ||
7d93a1e0 | 408 | if (type->name () != NULL) |
b96645f1 MG |
409 | fputs_filtered (" ", stream); |
410 | } | |
411 | ||
412 | if (is_tuple || is_tuple_struct) | |
413 | fputs_filtered ("(", stream); | |
414 | else | |
415 | fputs_filtered ("{", stream); | |
416 | ||
417 | opts = *options; | |
418 | opts.deref_ref = 0; | |
419 | ||
420 | first_field = 1; | |
1f704f76 | 421 | for (i = 0; i < type->num_fields (); ++i) |
b96645f1 | 422 | { |
ceacbf6e | 423 | if (field_is_static (&type->field (i))) |
b96645f1 MG |
424 | continue; |
425 | ||
426 | if (!first_field) | |
427 | fputs_filtered (",", stream); | |
428 | ||
429 | if (options->prettyformat) | |
430 | { | |
b50f188d TT |
431 | fputs_filtered ("\n", stream); |
432 | print_spaces_filtered (2 + 2 * recurse, stream); | |
b96645f1 MG |
433 | } |
434 | else if (!first_field) | |
435 | fputs_filtered (" ", stream); | |
436 | ||
437 | first_field = 0; | |
438 | ||
439 | if (!is_tuple && !is_tuple_struct) | |
440 | { | |
3f0cbb04 TT |
441 | fputs_styled (TYPE_FIELD_NAME (type, i), |
442 | variable_name_style.style (), stream); | |
b50f188d | 443 | fputs_filtered (": ", stream); |
b96645f1 MG |
444 | } |
445 | ||
5f56f7cb TT |
446 | rust_value_print_inner (value_field (val, i), stream, recurse + 1, |
447 | &opts); | |
b96645f1 MG |
448 | } |
449 | ||
450 | if (options->prettyformat) | |
451 | { | |
452 | fputs_filtered ("\n", stream); | |
453 | print_spaces_filtered (2 * recurse, stream); | |
454 | } | |
455 | ||
456 | if (is_tuple || is_tuple_struct) | |
457 | fputs_filtered (")", stream); | |
458 | else | |
459 | fputs_filtered ("}", stream); | |
460 | } | |
461 | ||
c9317f21 TT |
462 | /* rust_val_print helper for discriminated unions (Rust enums). */ |
463 | ||
464 | static void | |
5f56f7cb | 465 | rust_print_enum (struct value *val, struct ui_file *stream, int recurse, |
c9317f21 TT |
466 | const struct value_print_options *options) |
467 | { | |
468 | struct value_print_options opts = *options; | |
5f56f7cb | 469 | struct type *type = check_typedef (value_type (val)); |
c9317f21 TT |
470 | |
471 | opts.deref_ref = 0; | |
472 | ||
9c6a1327 TT |
473 | gdb_assert (rust_enum_p (type)); |
474 | gdb::array_view<const gdb_byte> view (value_contents_for_printing (val), | |
475 | TYPE_LENGTH (value_type (val))); | |
476 | type = resolve_dynamic_type (type, view, value_address (val)); | |
477 | ||
098b2108 TT |
478 | if (rust_empty_enum_p (type)) |
479 | { | |
480 | /* Print the enum type name here to be more clear. */ | |
7f6aba03 | 481 | fprintf_filtered (stream, _("%s {%p[<No data fields>%p]}"), |
7d93a1e0 | 482 | type->name (), |
7f6aba03 | 483 | metadata_style.style ().ptr (), nullptr); |
098b2108 TT |
484 | return; |
485 | } | |
486 | ||
9c6a1327 TT |
487 | int variant_fieldno = rust_enum_variant (type); |
488 | val = value_field (val, variant_fieldno); | |
940da03e | 489 | struct type *variant_type = type->field (variant_fieldno).type (); |
c9317f21 | 490 | |
1f704f76 | 491 | int nfields = variant_type->num_fields (); |
c9317f21 TT |
492 | |
493 | bool is_tuple = rust_tuple_struct_type_p (variant_type); | |
494 | ||
7d93a1e0 | 495 | fprintf_filtered (stream, "%s", variant_type->name ()); |
c9317f21 TT |
496 | if (nfields == 0) |
497 | { | |
498 | /* In case of a nullary variant like 'None', just output | |
499 | the name. */ | |
500 | return; | |
501 | } | |
502 | ||
503 | /* In case of a non-nullary variant, we output 'Foo(x,y,z)'. */ | |
504 | if (is_tuple) | |
505 | fprintf_filtered (stream, "("); | |
506 | else | |
507 | { | |
508 | /* struct variant. */ | |
509 | fprintf_filtered (stream, "{"); | |
510 | } | |
511 | ||
512 | bool first_field = true; | |
1f704f76 | 513 | for (int j = 0; j < variant_type->num_fields (); j++) |
c9317f21 TT |
514 | { |
515 | if (!first_field) | |
516 | fputs_filtered (", ", stream); | |
517 | first_field = false; | |
518 | ||
519 | if (!is_tuple) | |
3f0cbb04 TT |
520 | fprintf_filtered (stream, "%ps: ", |
521 | styled_string (variable_name_style.style (), | |
522 | TYPE_FIELD_NAME (variant_type, j))); | |
c9317f21 | 523 | |
5f56f7cb TT |
524 | rust_value_print_inner (value_field (val, j), stream, recurse + 1, |
525 | &opts); | |
c9317f21 TT |
526 | } |
527 | ||
528 | if (is_tuple) | |
529 | fputs_filtered (")", stream); | |
530 | else | |
531 | fputs_filtered ("}", stream); | |
532 | } | |
533 | ||
c44af4eb TT |
534 | static const struct generic_val_print_decorations rust_decorations = |
535 | { | |
536 | /* Complex isn't used in Rust, but we provide C-ish values just in | |
537 | case. */ | |
538 | "", | |
539 | " + ", | |
540 | " * I", | |
541 | "true", | |
542 | "false", | |
921d8f54 | 543 | "()", |
c44af4eb TT |
544 | "[", |
545 | "]" | |
546 | }; | |
547 | ||
5f56f7cb TT |
548 | /* la_value_print_inner implementation for Rust. */ |
549 | static void | |
550 | rust_value_print_inner (struct value *val, struct ui_file *stream, | |
551 | int recurse, | |
552 | const struct value_print_options *options) | |
553 | { | |
554 | struct value_print_options opts = *options; | |
555 | opts.deref_ref = 1; | |
556 | ||
557 | if (opts.prettyformat == Val_prettyformat_default) | |
558 | opts.prettyformat = (opts.prettyformat_structs | |
559 | ? Val_prettyformat : Val_no_prettyformat); | |
560 | ||
561 | struct type *type = check_typedef (value_type (val)); | |
78134374 | 562 | switch (type->code ()) |
c44af4eb TT |
563 | { |
564 | case TYPE_CODE_PTR: | |
565 | { | |
566 | LONGEST low_bound, high_bound; | |
567 | ||
78134374 | 568 | if (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_ARRAY |
c44af4eb TT |
569 | && rust_u8_type_p (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (type))) |
570 | && get_array_bounds (TYPE_TARGET_TYPE (type), &low_bound, | |
5f56f7cb TT |
571 | &high_bound)) |
572 | { | |
573 | /* We have a pointer to a byte string, so just print | |
574 | that. */ | |
575 | struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type)); | |
576 | CORE_ADDR addr = value_as_address (val); | |
577 | struct gdbarch *arch = get_type_arch (type); | |
c44af4eb | 578 | |
5f56f7cb TT |
579 | if (opts.addressprint) |
580 | { | |
581 | fputs_filtered (paddress (arch, addr), stream); | |
582 | fputs_filtered (" ", stream); | |
583 | } | |
c44af4eb | 584 | |
5f56f7cb TT |
585 | fputs_filtered ("b", stream); |
586 | val_print_string (TYPE_TARGET_TYPE (elttype), "ASCII", addr, | |
587 | high_bound - low_bound + 1, stream, | |
588 | &opts); | |
589 | break; | |
590 | } | |
c44af4eb | 591 | } |
5f56f7cb | 592 | goto generic_print; |
c44af4eb TT |
593 | |
594 | case TYPE_CODE_METHODPTR: | |
595 | case TYPE_CODE_MEMBERPTR: | |
5f56f7cb | 596 | c_value_print_inner (val, stream, recurse, &opts); |
c44af4eb TT |
597 | break; |
598 | ||
599 | case TYPE_CODE_INT: | |
600 | /* Recognize the unit type. */ | |
601 | if (TYPE_UNSIGNED (type) && TYPE_LENGTH (type) == 0 | |
7d93a1e0 | 602 | && type->name () != NULL && strcmp (type->name (), "()") == 0) |
c44af4eb TT |
603 | { |
604 | fputs_filtered ("()", stream); | |
605 | break; | |
606 | } | |
607 | goto generic_print; | |
608 | ||
609 | case TYPE_CODE_STRING: | |
610 | { | |
c44af4eb TT |
611 | LONGEST low_bound, high_bound; |
612 | ||
613 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
614 | error (_("Could not determine the array bounds")); | |
615 | ||
616 | /* If we see a plain TYPE_CODE_STRING, then we're printing a | |
617 | byte string, hence the choice of "ASCII" as the | |
618 | encoding. */ | |
619 | fputs_filtered ("b", stream); | |
620 | rust_printstr (stream, TYPE_TARGET_TYPE (type), | |
5f56f7cb TT |
621 | value_contents_for_printing (val), |
622 | high_bound - low_bound + 1, "ASCII", 0, &opts); | |
c44af4eb TT |
623 | } |
624 | break; | |
625 | ||
626 | case TYPE_CODE_ARRAY: | |
627 | { | |
628 | LONGEST low_bound, high_bound; | |
629 | ||
630 | if (get_array_bounds (type, &low_bound, &high_bound) | |
631 | && high_bound - low_bound + 1 == 0) | |
632 | fputs_filtered ("[]", stream); | |
633 | else | |
634 | goto generic_print; | |
635 | } | |
636 | break; | |
637 | ||
638 | case TYPE_CODE_UNION: | |
c9317f21 TT |
639 | /* Untagged unions are printed as if they are structs. Since |
640 | the field bit positions overlap in the debuginfo, the code | |
641 | for printing a union is same as that for a struct, the only | |
642 | difference is that the input type will have overlapping | |
643 | fields. */ | |
5f56f7cb | 644 | val_print_struct (val, stream, recurse, &opts); |
c44af4eb TT |
645 | break; |
646 | ||
647 | case TYPE_CODE_STRUCT: | |
c9317f21 | 648 | if (rust_enum_p (type)) |
5f56f7cb | 649 | rust_print_enum (val, stream, recurse, &opts); |
c9317f21 | 650 | else |
5f56f7cb | 651 | val_print_struct (val, stream, recurse, &opts); |
b96645f1 | 652 | break; |
c44af4eb | 653 | |
b96645f1 MG |
654 | default: |
655 | generic_print: | |
656 | /* Nothing special yet. */ | |
5f56f7cb | 657 | generic_value_print (val, stream, recurse, &opts, &rust_decorations); |
b96645f1 MG |
658 | } |
659 | } | |
c44af4eb | 660 | |
b96645f1 | 661 | \f |
c44af4eb | 662 | |
b96645f1 | 663 | static void |
c9317f21 TT |
664 | rust_internal_print_type (struct type *type, const char *varstring, |
665 | struct ui_file *stream, int show, int level, | |
666 | const struct type_print_options *flags, | |
a33ccfc7 | 667 | bool for_rust_enum, print_offset_data *podata); |
b96645f1 MG |
668 | |
669 | /* Print a struct or union typedef. */ | |
670 | static void | |
671 | rust_print_struct_def (struct type *type, const char *varstring, | |
b50f188d | 672 | struct ui_file *stream, int show, int level, |
c9317f21 | 673 | const struct type_print_options *flags, |
a33ccfc7 | 674 | bool for_rust_enum, print_offset_data *podata) |
b96645f1 | 675 | { |
b50f188d TT |
676 | /* Print a tuple type simply. */ |
677 | if (rust_tuple_type_p (type)) | |
678 | { | |
7d93a1e0 | 679 | fputs_filtered (type->name (), stream); |
b50f188d TT |
680 | return; |
681 | } | |
c44af4eb | 682 | |
b50f188d TT |
683 | /* If we see a base class, delegate to C. */ |
684 | if (TYPE_N_BASECLASSES (type) > 0) | |
685 | c_print_type (type, varstring, stream, show, level, flags); | |
c44af4eb | 686 | |
a33ccfc7 TT |
687 | if (flags->print_offsets) |
688 | { | |
689 | /* Temporarily bump the level so that the output lines up | |
690 | correctly. */ | |
691 | level += 2; | |
692 | } | |
693 | ||
c9317f21 TT |
694 | /* Compute properties of TYPE here because, in the enum case, the |
695 | rest of the code ends up looking only at the variant part. */ | |
7d93a1e0 | 696 | const char *tagname = type->name (); |
c9317f21 TT |
697 | bool is_tuple_struct = rust_tuple_struct_type_p (type); |
698 | bool is_tuple = rust_tuple_type_p (type); | |
699 | bool is_enum = rust_enum_p (type); | |
b96645f1 | 700 | |
c9317f21 TT |
701 | if (for_rust_enum) |
702 | { | |
703 | /* Already printing an outer enum, so nothing to print here. */ | |
704 | } | |
705 | else | |
706 | { | |
707 | /* This code path is also used by unions and enums. */ | |
708 | if (is_enum) | |
709 | { | |
710 | fputs_filtered ("enum ", stream); | |
24e99c6c | 711 | dynamic_prop *prop = type->dyn_prop (DYN_PROP_VARIANT_PARTS); |
9c6a1327 TT |
712 | if (prop != nullptr && prop->kind == PROP_TYPE) |
713 | type = prop->data.original_type; | |
c9317f21 | 714 | } |
78134374 | 715 | else if (type->code () == TYPE_CODE_STRUCT) |
c9317f21 TT |
716 | fputs_filtered ("struct ", stream); |
717 | else | |
718 | fputs_filtered ("union ", stream); | |
b96645f1 | 719 | |
c9317f21 TT |
720 | if (tagname != NULL) |
721 | fputs_filtered (tagname, stream); | |
722 | } | |
b96645f1 | 723 | |
1f704f76 | 724 | if (type->num_fields () == 0 && !is_tuple) |
b50f188d | 725 | return; |
a33ccfc7 | 726 | if (for_rust_enum && !flags->print_offsets) |
c9317f21 TT |
727 | fputs_filtered (is_tuple_struct ? "(" : "{", stream); |
728 | else | |
729 | fputs_filtered (is_tuple_struct ? " (\n" : " {\n", stream); | |
c44af4eb | 730 | |
a33ccfc7 TT |
731 | /* When printing offsets, we rearrange the fields into storage |
732 | order. This lets us show holes more clearly. We work using | |
733 | field indices here because it simplifies calls to | |
734 | print_offset_data::update below. */ | |
735 | std::vector<int> fields; | |
1f704f76 | 736 | for (int i = 0; i < type->num_fields (); ++i) |
b50f188d | 737 | { |
ceacbf6e | 738 | if (field_is_static (&type->field (i))) |
b50f188d | 739 | continue; |
9c6a1327 | 740 | if (is_enum && TYPE_FIELD_ARTIFICIAL (type, i)) |
a33ccfc7 TT |
741 | continue; |
742 | fields.push_back (i); | |
743 | } | |
744 | if (flags->print_offsets) | |
745 | std::sort (fields.begin (), fields.end (), | |
746 | [&] (int a, int b) | |
747 | { | |
748 | return (TYPE_FIELD_BITPOS (type, a) | |
749 | < TYPE_FIELD_BITPOS (type, b)); | |
750 | }); | |
751 | ||
752 | for (int i : fields) | |
753 | { | |
754 | QUIT; | |
755 | ||
ceacbf6e | 756 | gdb_assert (!field_is_static (&type->field (i))); |
9c6a1327 | 757 | gdb_assert (! (is_enum && TYPE_FIELD_ARTIFICIAL (type, i))); |
a33ccfc7 TT |
758 | |
759 | if (flags->print_offsets) | |
760 | podata->update (type, i, stream); | |
b50f188d TT |
761 | |
762 | /* We'd like to print "pub" here as needed, but rustc | |
763 | doesn't emit the debuginfo, and our types don't have | |
764 | cplus_struct_type attached. */ | |
765 | ||
766 | /* For a tuple struct we print the type but nothing | |
767 | else. */ | |
a33ccfc7 | 768 | if (!for_rust_enum || flags->print_offsets) |
c9317f21 TT |
769 | print_spaces_filtered (level + 2, stream); |
770 | if (is_enum) | |
3f0cbb04 TT |
771 | fputs_styled (TYPE_FIELD_NAME (type, i), variable_name_style.style (), |
772 | stream); | |
c9317f21 | 773 | else if (!is_tuple_struct) |
3f0cbb04 TT |
774 | fprintf_filtered (stream, "%ps: ", |
775 | styled_string (variable_name_style.style (), | |
776 | TYPE_FIELD_NAME (type, i))); | |
b50f188d | 777 | |
940da03e | 778 | rust_internal_print_type (type->field (i).type (), NULL, |
53d7df28 | 779 | stream, (is_enum ? show : show - 1), |
a33ccfc7 TT |
780 | level + 2, flags, is_enum, podata); |
781 | if (!for_rust_enum || flags->print_offsets) | |
c9317f21 | 782 | fputs_filtered (",\n", stream); |
a33ccfc7 TT |
783 | /* Note that this check of "I" is ok because we only sorted the |
784 | fields by offset when print_offsets was set, so we won't take | |
785 | this branch in that case. */ | |
1f704f76 | 786 | else if (i + 1 < type->num_fields ()) |
c9317f21 | 787 | fputs_filtered (", ", stream); |
b50f188d | 788 | } |
c44af4eb | 789 | |
a33ccfc7 TT |
790 | if (flags->print_offsets) |
791 | { | |
792 | /* Undo the temporary level increase we did above. */ | |
793 | level -= 2; | |
794 | podata->finish (type, level, stream); | |
795 | print_spaces_filtered (print_offset_data::indentation, stream); | |
796 | if (level == 0) | |
797 | print_spaces_filtered (2, stream); | |
798 | } | |
799 | if (!for_rust_enum || flags->print_offsets) | |
c9317f21 TT |
800 | print_spaces_filtered (level, stream); |
801 | fputs_filtered (is_tuple_struct ? ")" : "}", stream); | |
c44af4eb TT |
802 | } |
803 | ||
c44af4eb TT |
804 | /* la_print_typedef implementation for Rust. */ |
805 | ||
806 | static void | |
807 | rust_print_typedef (struct type *type, | |
808 | struct symbol *new_symbol, | |
809 | struct ui_file *stream) | |
810 | { | |
811 | type = check_typedef (type); | |
987012b8 | 812 | fprintf_filtered (stream, "type %s = ", new_symbol->print_name ()); |
c44af4eb | 813 | type_print (type, "", stream, 0); |
e1709896 | 814 | fprintf_filtered (stream, ";"); |
c44af4eb TT |
815 | } |
816 | ||
817 | /* la_print_type implementation for Rust. */ | |
818 | ||
819 | static void | |
c9317f21 TT |
820 | rust_internal_print_type (struct type *type, const char *varstring, |
821 | struct ui_file *stream, int show, int level, | |
822 | const struct type_print_options *flags, | |
a33ccfc7 | 823 | bool for_rust_enum, print_offset_data *podata) |
c44af4eb | 824 | { |
c44af4eb TT |
825 | QUIT; |
826 | if (show <= 0 | |
7d93a1e0 | 827 | && type->name () != NULL) |
c44af4eb | 828 | { |
921d8f54 MG |
829 | /* Rust calls the unit type "void" in its debuginfo, |
830 | but we don't want to print it as that. */ | |
78134374 | 831 | if (type->code () == TYPE_CODE_VOID) |
921d8f54 MG |
832 | fputs_filtered ("()", stream); |
833 | else | |
7d93a1e0 | 834 | fputs_filtered (type->name (), stream); |
c44af4eb TT |
835 | return; |
836 | } | |
837 | ||
838 | type = check_typedef (type); | |
78134374 | 839 | switch (type->code ()) |
c44af4eb | 840 | { |
921d8f54 | 841 | case TYPE_CODE_VOID: |
c9317f21 TT |
842 | /* If we have an enum, we've already printed the type's |
843 | unqualified name, and there is nothing else to print | |
844 | here. */ | |
845 | if (!for_rust_enum) | |
846 | fputs_filtered ("()", stream); | |
921d8f54 MG |
847 | break; |
848 | ||
c44af4eb TT |
849 | case TYPE_CODE_FUNC: |
850 | /* Delegate varargs to the C printer. */ | |
851 | if (TYPE_VARARGS (type)) | |
852 | goto c_printer; | |
853 | ||
854 | fputs_filtered ("fn ", stream); | |
855 | if (varstring != NULL) | |
856 | fputs_filtered (varstring, stream); | |
857 | fputs_filtered ("(", stream); | |
1f704f76 | 858 | for (int i = 0; i < type->num_fields (); ++i) |
c44af4eb TT |
859 | { |
860 | QUIT; | |
861 | if (i > 0) | |
862 | fputs_filtered (", ", stream); | |
940da03e | 863 | rust_internal_print_type (type->field (i).type (), "", stream, |
a33ccfc7 | 864 | -1, 0, flags, false, podata); |
c44af4eb | 865 | } |
921d8f54 MG |
866 | fputs_filtered (")", stream); |
867 | /* If it returns unit, we can omit the return type. */ | |
78134374 | 868 | if (TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_VOID) |
921d8f54 MG |
869 | { |
870 | fputs_filtered (" -> ", stream); | |
c9317f21 | 871 | rust_internal_print_type (TYPE_TARGET_TYPE (type), "", stream, |
a33ccfc7 | 872 | -1, 0, flags, false, podata); |
921d8f54 | 873 | } |
c44af4eb TT |
874 | break; |
875 | ||
876 | case TYPE_CODE_ARRAY: | |
877 | { | |
878 | LONGEST low_bound, high_bound; | |
879 | ||
880 | fputs_filtered ("[", stream); | |
c9317f21 | 881 | rust_internal_print_type (TYPE_TARGET_TYPE (type), NULL, |
a33ccfc7 TT |
882 | stream, show - 1, level, flags, false, |
883 | podata); | |
c44af4eb | 884 | |
3d967001 SM |
885 | if (TYPE_HIGH_BOUND_KIND (type->index_type ()) == PROP_LOCEXPR |
886 | || TYPE_HIGH_BOUND_KIND (type->index_type ()) == PROP_LOCLIST) | |
e6cf65f2 | 887 | fprintf_filtered (stream, "; variable length"); |
c44af4eb | 888 | else if (get_array_bounds (type, &low_bound, &high_bound)) |
e6cf65f2 | 889 | fprintf_filtered (stream, "; %s", |
c44af4eb TT |
890 | plongest (high_bound - low_bound + 1)); |
891 | fputs_filtered ("]", stream); | |
892 | } | |
893 | break; | |
894 | ||
c9317f21 | 895 | case TYPE_CODE_UNION: |
c44af4eb | 896 | case TYPE_CODE_STRUCT: |
c9317f21 | 897 | rust_print_struct_def (type, varstring, stream, show, level, flags, |
a33ccfc7 | 898 | for_rust_enum, podata); |
c44af4eb TT |
899 | break; |
900 | ||
901 | case TYPE_CODE_ENUM: | |
902 | { | |
b926417a | 903 | int len = 0; |
c44af4eb TT |
904 | |
905 | fputs_filtered ("enum ", stream); | |
7d93a1e0 | 906 | if (type->name () != NULL) |
c44af4eb | 907 | { |
7d93a1e0 | 908 | fputs_filtered (type->name (), stream); |
c44af4eb | 909 | fputs_filtered (" ", stream); |
7d93a1e0 | 910 | len = strlen (type->name ()); |
c44af4eb TT |
911 | } |
912 | fputs_filtered ("{\n", stream); | |
913 | ||
1f704f76 | 914 | for (int i = 0; i < type->num_fields (); ++i) |
c44af4eb TT |
915 | { |
916 | const char *name = TYPE_FIELD_NAME (type, i); | |
917 | ||
918 | QUIT; | |
919 | ||
920 | if (len > 0 | |
7d93a1e0 | 921 | && strncmp (name, type->name (), len) == 0 |
c44af4eb TT |
922 | && name[len] == ':' |
923 | && name[len + 1] == ':') | |
924 | name += len + 2; | |
3f0cbb04 TT |
925 | fprintfi_filtered (level + 2, stream, "%ps,\n", |
926 | styled_string (variable_name_style.style (), | |
927 | name)); | |
c44af4eb TT |
928 | } |
929 | ||
930 | fputs_filtered ("}", stream); | |
931 | } | |
73fc52c4 TT |
932 | break; |
933 | ||
934 | case TYPE_CODE_PTR: | |
935 | { | |
7d93a1e0 SM |
936 | if (type->name () != nullptr) |
937 | fputs_filtered (type->name (), stream); | |
73fc52c4 TT |
938 | else |
939 | { | |
940 | /* We currently can't distinguish between pointers and | |
941 | references. */ | |
942 | fputs_filtered ("*mut ", stream); | |
943 | type_print (TYPE_TARGET_TYPE (type), "", stream, 0); | |
944 | } | |
945 | } | |
c44af4eb TT |
946 | break; |
947 | ||
c44af4eb TT |
948 | default: |
949 | c_printer: | |
950 | c_print_type (type, varstring, stream, show, level, flags); | |
951 | } | |
952 | } | |
953 | ||
954 | \f | |
955 | ||
c44af4eb TT |
956 | /* Like arch_composite_type, but uses TYPE to decide how to allocate |
957 | -- either on an obstack or on a gdbarch. */ | |
958 | ||
959 | static struct type * | |
960 | rust_composite_type (struct type *original, | |
961 | const char *name, | |
962 | const char *field1, struct type *type1, | |
963 | const char *field2, struct type *type2) | |
964 | { | |
965 | struct type *result = alloc_type_copy (original); | |
966 | int i, nfields, bitpos; | |
967 | ||
968 | nfields = 0; | |
969 | if (field1 != NULL) | |
970 | ++nfields; | |
971 | if (field2 != NULL) | |
972 | ++nfields; | |
973 | ||
67607e24 | 974 | result->set_code (TYPE_CODE_STRUCT); |
d0e39ea2 | 975 | result->set_name (name); |
c44af4eb | 976 | |
5e33d5f4 | 977 | result->set_num_fields (nfields); |
3cabb6b0 SM |
978 | result->set_fields |
979 | ((struct field *) TYPE_ZALLOC (result, nfields * sizeof (struct field))); | |
c44af4eb TT |
980 | |
981 | i = 0; | |
982 | bitpos = 0; | |
983 | if (field1 != NULL) | |
984 | { | |
ceacbf6e | 985 | struct field *field = &result->field (i); |
c44af4eb TT |
986 | |
987 | SET_FIELD_BITPOS (*field, bitpos); | |
988 | bitpos += TYPE_LENGTH (type1) * TARGET_CHAR_BIT; | |
989 | ||
990 | FIELD_NAME (*field) = field1; | |
5d14b6e5 | 991 | field->set_type (type1); |
c44af4eb TT |
992 | ++i; |
993 | } | |
994 | if (field2 != NULL) | |
995 | { | |
ceacbf6e | 996 | struct field *field = &result->field (i); |
2fff16dd | 997 | unsigned align = type_align (type2); |
c44af4eb TT |
998 | |
999 | if (align != 0) | |
1000 | { | |
1001 | int delta; | |
1002 | ||
1003 | align *= TARGET_CHAR_BIT; | |
1004 | delta = bitpos % align; | |
1005 | if (delta != 0) | |
1006 | bitpos += align - delta; | |
1007 | } | |
1008 | SET_FIELD_BITPOS (*field, bitpos); | |
1009 | ||
1010 | FIELD_NAME (*field) = field2; | |
5d14b6e5 | 1011 | field->set_type (type2); |
c44af4eb TT |
1012 | ++i; |
1013 | } | |
1014 | ||
1015 | if (i > 0) | |
1016 | TYPE_LENGTH (result) | |
1017 | = (TYPE_FIELD_BITPOS (result, i - 1) / TARGET_CHAR_BIT + | |
940da03e | 1018 | TYPE_LENGTH (result->field (i - 1).type ())); |
c44af4eb TT |
1019 | return result; |
1020 | } | |
1021 | ||
1022 | /* See rust-lang.h. */ | |
1023 | ||
1024 | struct type * | |
1025 | rust_slice_type (const char *name, struct type *elt_type, | |
1026 | struct type *usize_type) | |
1027 | { | |
1028 | struct type *type; | |
1029 | ||
1030 | elt_type = lookup_pointer_type (elt_type); | |
1031 | type = rust_composite_type (elt_type, name, | |
1032 | "data_ptr", elt_type, | |
1033 | "length", usize_type); | |
1034 | ||
1035 | return type; | |
1036 | } | |
1037 | ||
1038 | enum rust_primitive_types | |
1039 | { | |
1040 | rust_primitive_bool, | |
1041 | rust_primitive_char, | |
1042 | rust_primitive_i8, | |
1043 | rust_primitive_u8, | |
1044 | rust_primitive_i16, | |
1045 | rust_primitive_u16, | |
1046 | rust_primitive_i32, | |
1047 | rust_primitive_u32, | |
1048 | rust_primitive_i64, | |
1049 | rust_primitive_u64, | |
1050 | rust_primitive_isize, | |
1051 | rust_primitive_usize, | |
1052 | rust_primitive_f32, | |
1053 | rust_primitive_f64, | |
1054 | rust_primitive_unit, | |
1055 | rust_primitive_str, | |
1056 | nr_rust_primitive_types | |
1057 | }; | |
1058 | ||
c44af4eb TT |
1059 | \f |
1060 | ||
1061 | /* A helper for rust_evaluate_subexp that handles OP_FUNCALL. */ | |
1062 | ||
1063 | static struct value * | |
1064 | rust_evaluate_funcall (struct expression *exp, int *pos, enum noside noside) | |
1065 | { | |
1066 | int i; | |
1067 | int num_args = exp->elts[*pos + 1].longconst; | |
1068 | const char *method; | |
c44af4eb | 1069 | struct value *function, *result, *arg0; |
c44af4eb TT |
1070 | struct type *type, *fn_type; |
1071 | const struct block *block; | |
1072 | struct block_symbol sym; | |
1073 | ||
1074 | /* For an ordinary function call we can simply defer to the | |
1075 | generic implementation. */ | |
1076 | if (exp->elts[*pos + 3].opcode != STRUCTOP_STRUCT) | |
1077 | return evaluate_subexp_standard (NULL, exp, pos, noside); | |
1078 | ||
1079 | /* Skip over the OP_FUNCALL and the STRUCTOP_STRUCT. */ | |
1080 | *pos += 4; | |
1081 | method = &exp->elts[*pos + 1].string; | |
1082 | *pos += 3 + BYTES_TO_EXP_ELEM (exp->elts[*pos].longconst + 1); | |
1083 | ||
1084 | /* Evaluate the argument to STRUCTOP_STRUCT, then find its | |
1085 | type in order to look up the method. */ | |
1086 | arg0 = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1087 | ||
1088 | if (noside == EVAL_SKIP) | |
1089 | { | |
1090 | for (i = 0; i < num_args; ++i) | |
1091 | evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1092 | return arg0; | |
1093 | } | |
1094 | ||
ab8b80a8 | 1095 | std::vector<struct value *> args (num_args + 1); |
c44af4eb TT |
1096 | args[0] = arg0; |
1097 | ||
1098 | /* We don't yet implement real Deref semantics. */ | |
78134374 | 1099 | while (value_type (args[0])->code () == TYPE_CODE_PTR) |
c44af4eb TT |
1100 | args[0] = value_ind (args[0]); |
1101 | ||
1102 | type = value_type (args[0]); | |
78134374 SM |
1103 | if ((type->code () != TYPE_CODE_STRUCT |
1104 | && type->code () != TYPE_CODE_UNION | |
1105 | && type->code () != TYPE_CODE_ENUM) | |
c44af4eb TT |
1106 | || rust_tuple_type_p (type)) |
1107 | error (_("Method calls only supported on struct or enum types")); | |
7d93a1e0 | 1108 | if (type->name () == NULL) |
c44af4eb TT |
1109 | error (_("Method call on nameless type")); |
1110 | ||
7d93a1e0 | 1111 | std::string name = std::string (type->name ()) + "::" + method; |
c44af4eb TT |
1112 | |
1113 | block = get_selected_block (0); | |
ab8b80a8 | 1114 | sym = lookup_symbol (name.c_str (), block, VAR_DOMAIN, NULL); |
c44af4eb | 1115 | if (sym.symbol == NULL) |
ab8b80a8 | 1116 | error (_("Could not find function named '%s'"), name.c_str ()); |
c44af4eb TT |
1117 | |
1118 | fn_type = SYMBOL_TYPE (sym.symbol); | |
1f704f76 | 1119 | if (fn_type->num_fields () == 0) |
ab8b80a8 | 1120 | error (_("Function '%s' takes no arguments"), name.c_str ()); |
c44af4eb | 1121 | |
940da03e | 1122 | if (fn_type->field (0).type ()->code () == TYPE_CODE_PTR) |
c44af4eb TT |
1123 | args[0] = value_addr (args[0]); |
1124 | ||
1125 | function = address_of_variable (sym.symbol, block); | |
1126 | ||
1127 | for (i = 0; i < num_args; ++i) | |
1128 | args[i + 1] = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1129 | ||
1130 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1131 | result = value_zero (TYPE_TARGET_TYPE (fn_type), not_lval); | |
1132 | else | |
e71585ff | 1133 | result = call_function_by_hand (function, NULL, args); |
c44af4eb TT |
1134 | return result; |
1135 | } | |
1136 | ||
01739a3b | 1137 | /* A helper for rust_evaluate_subexp that handles OP_RANGE. */ |
c44af4eb TT |
1138 | |
1139 | static struct value * | |
1140 | rust_range (struct expression *exp, int *pos, enum noside noside) | |
1141 | { | |
01739a3b | 1142 | enum range_type kind; |
c44af4eb TT |
1143 | struct value *low = NULL, *high = NULL; |
1144 | struct value *addrval, *result; | |
1145 | CORE_ADDR addr; | |
1146 | struct type *range_type; | |
1147 | struct type *index_type; | |
1148 | struct type *temp_type; | |
1149 | const char *name; | |
1150 | ||
01739a3b | 1151 | kind = (enum range_type) longest_to_int (exp->elts[*pos + 1].longconst); |
c44af4eb TT |
1152 | *pos += 3; |
1153 | ||
6873858b TT |
1154 | if (kind == HIGH_BOUND_DEFAULT || kind == NONE_BOUND_DEFAULT |
1155 | || kind == NONE_BOUND_DEFAULT_EXCLUSIVE) | |
c44af4eb | 1156 | low = evaluate_subexp (NULL_TYPE, exp, pos, noside); |
6873858b TT |
1157 | if (kind == LOW_BOUND_DEFAULT || kind == LOW_BOUND_DEFAULT_EXCLUSIVE |
1158 | || kind == NONE_BOUND_DEFAULT || kind == NONE_BOUND_DEFAULT_EXCLUSIVE) | |
c44af4eb | 1159 | high = evaluate_subexp (NULL_TYPE, exp, pos, noside); |
6873858b | 1160 | bool inclusive = (kind == NONE_BOUND_DEFAULT || kind == LOW_BOUND_DEFAULT); |
c44af4eb TT |
1161 | |
1162 | if (noside == EVAL_SKIP) | |
1163 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1); | |
1164 | ||
1165 | if (low == NULL) | |
1166 | { | |
1167 | if (high == NULL) | |
1168 | { | |
1169 | index_type = NULL; | |
1170 | name = "std::ops::RangeFull"; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | index_type = value_type (high); | |
6873858b TT |
1175 | name = (inclusive |
1176 | ? "std::ops::RangeToInclusive" : "std::ops::RangeTo"); | |
c44af4eb TT |
1177 | } |
1178 | } | |
1179 | else | |
1180 | { | |
1181 | if (high == NULL) | |
1182 | { | |
1183 | index_type = value_type (low); | |
1184 | name = "std::ops::RangeFrom"; | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | if (!types_equal (value_type (low), value_type (high))) | |
1189 | error (_("Range expression with different types")); | |
1190 | index_type = value_type (low); | |
6873858b | 1191 | name = inclusive ? "std::ops::RangeInclusive" : "std::ops::Range"; |
c44af4eb TT |
1192 | } |
1193 | } | |
1194 | ||
1195 | /* If we don't have an index type, just allocate this on the | |
1196 | arch. Here any type will do. */ | |
1197 | temp_type = (index_type == NULL | |
1198 | ? language_bool_type (exp->language_defn, exp->gdbarch) | |
1199 | : index_type); | |
1200 | /* It would be nicer to cache the range type. */ | |
1201 | range_type = rust_composite_type (temp_type, name, | |
1202 | low == NULL ? NULL : "start", index_type, | |
1203 | high == NULL ? NULL : "end", index_type); | |
1204 | ||
1205 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1206 | return value_zero (range_type, lval_memory); | |
1207 | ||
1208 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (range_type)); | |
1209 | addr = value_as_long (addrval); | |
1210 | result = value_at_lazy (range_type, addr); | |
1211 | ||
1212 | if (low != NULL) | |
1213 | { | |
1214 | struct value *start = value_struct_elt (&result, NULL, "start", NULL, | |
1215 | "range"); | |
1216 | ||
1217 | value_assign (start, low); | |
1218 | } | |
1219 | ||
1220 | if (high != NULL) | |
1221 | { | |
1222 | struct value *end = value_struct_elt (&result, NULL, "end", NULL, | |
1223 | "range"); | |
1224 | ||
1225 | value_assign (end, high); | |
1226 | } | |
1227 | ||
1228 | result = value_at_lazy (range_type, addr); | |
1229 | return result; | |
1230 | } | |
1231 | ||
1232 | /* A helper function to compute the range and kind given a range | |
1233 | value. TYPE is the type of the range value. RANGE is the range | |
1234 | value. LOW, HIGH, and KIND are out parameters. The LOW and HIGH | |
1235 | parameters might be filled in, or might not be, depending on the | |
1236 | kind of range this is. KIND will always be set to the appropriate | |
1237 | value describing the kind of range, and this can be used to | |
1238 | determine whether LOW or HIGH are valid. */ | |
1239 | ||
1240 | static void | |
1241 | rust_compute_range (struct type *type, struct value *range, | |
1242 | LONGEST *low, LONGEST *high, | |
01739a3b | 1243 | enum range_type *kind) |
c44af4eb TT |
1244 | { |
1245 | int i; | |
1246 | ||
1247 | *low = 0; | |
1248 | *high = 0; | |
1249 | *kind = BOTH_BOUND_DEFAULT; | |
1250 | ||
1f704f76 | 1251 | if (type->num_fields () == 0) |
c44af4eb TT |
1252 | return; |
1253 | ||
1254 | i = 0; | |
1255 | if (strcmp (TYPE_FIELD_NAME (type, 0), "start") == 0) | |
1256 | { | |
1257 | *kind = HIGH_BOUND_DEFAULT; | |
1258 | *low = value_as_long (value_field (range, 0)); | |
1259 | ++i; | |
1260 | } | |
1f704f76 | 1261 | if (type->num_fields () > i |
c44af4eb TT |
1262 | && strcmp (TYPE_FIELD_NAME (type, i), "end") == 0) |
1263 | { | |
1264 | *kind = (*kind == BOTH_BOUND_DEFAULT | |
1265 | ? LOW_BOUND_DEFAULT : NONE_BOUND_DEFAULT); | |
1266 | *high = value_as_long (value_field (range, i)); | |
6873858b TT |
1267 | |
1268 | if (rust_inclusive_range_type_p (type)) | |
1269 | ++*high; | |
c44af4eb TT |
1270 | } |
1271 | } | |
1272 | ||
1273 | /* A helper for rust_evaluate_subexp that handles BINOP_SUBSCRIPT. */ | |
1274 | ||
1275 | static struct value * | |
1276 | rust_subscript (struct expression *exp, int *pos, enum noside noside, | |
1277 | int for_addr) | |
1278 | { | |
1279 | struct value *lhs, *rhs, *result; | |
1280 | struct type *rhstype; | |
45f4ed92 | 1281 | LONGEST low, high_bound; |
c44af4eb | 1282 | /* Initialized to appease the compiler. */ |
01739a3b | 1283 | enum range_type kind = BOTH_BOUND_DEFAULT; |
45f4ed92 | 1284 | LONGEST high = 0; |
c44af4eb TT |
1285 | int want_slice = 0; |
1286 | ||
1287 | ++*pos; | |
1288 | lhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1289 | rhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1290 | ||
1291 | if (noside == EVAL_SKIP) | |
1292 | return lhs; | |
1293 | ||
1294 | rhstype = check_typedef (value_type (rhs)); | |
1295 | if (rust_range_type_p (rhstype)) | |
1296 | { | |
1297 | if (!for_addr) | |
1298 | error (_("Can't take slice of array without '&'")); | |
1299 | rust_compute_range (rhstype, rhs, &low, &high, &kind); | |
1300 | want_slice = 1; | |
1301 | } | |
1302 | else | |
1303 | low = value_as_long (rhs); | |
1304 | ||
b3e3859b | 1305 | struct type *type = check_typedef (value_type (lhs)); |
c44af4eb TT |
1306 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
1307 | { | |
b3e3859b | 1308 | struct type *base_type = nullptr; |
78134374 | 1309 | if (type->code () == TYPE_CODE_ARRAY) |
b3e3859b TT |
1310 | base_type = TYPE_TARGET_TYPE (type); |
1311 | else if (rust_slice_type_p (type)) | |
1312 | { | |
1f704f76 | 1313 | for (int i = 0; i < type->num_fields (); ++i) |
b3e3859b TT |
1314 | { |
1315 | if (strcmp (TYPE_FIELD_NAME (type, i), "data_ptr") == 0) | |
1316 | { | |
940da03e | 1317 | base_type = TYPE_TARGET_TYPE (type->field (i).type ()); |
b3e3859b TT |
1318 | break; |
1319 | } | |
1320 | } | |
1321 | if (base_type == nullptr) | |
1322 | error (_("Could not find 'data_ptr' in slice type")); | |
1323 | } | |
78134374 | 1324 | else if (type->code () == TYPE_CODE_PTR) |
b3e3859b TT |
1325 | base_type = TYPE_TARGET_TYPE (type); |
1326 | else | |
1327 | error (_("Cannot subscript non-array type")); | |
1328 | ||
1329 | struct type *new_type; | |
1330 | if (want_slice) | |
1331 | { | |
1332 | if (rust_slice_type_p (type)) | |
1333 | new_type = type; | |
1334 | else | |
1335 | { | |
1336 | struct type *usize | |
1337 | = language_lookup_primitive_type (exp->language_defn, | |
1338 | exp->gdbarch, | |
1339 | "usize"); | |
1340 | new_type = rust_slice_type ("&[*gdb*]", base_type, usize); | |
1341 | } | |
1342 | } | |
1343 | else | |
1344 | new_type = base_type; | |
c44af4eb | 1345 | |
b3e3859b | 1346 | return value_zero (new_type, VALUE_LVAL (lhs)); |
c44af4eb TT |
1347 | } |
1348 | else | |
1349 | { | |
1350 | LONGEST low_bound; | |
1351 | struct value *base; | |
c44af4eb | 1352 | |
78134374 | 1353 | if (type->code () == TYPE_CODE_ARRAY) |
c44af4eb TT |
1354 | { |
1355 | base = lhs; | |
1356 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
1357 | error (_("Can't compute array bounds")); | |
1358 | if (low_bound != 0) | |
1359 | error (_("Found array with non-zero lower bound")); | |
1360 | ++high_bound; | |
1361 | } | |
1362 | else if (rust_slice_type_p (type)) | |
1363 | { | |
1364 | struct value *len; | |
1365 | ||
1366 | base = value_struct_elt (&lhs, NULL, "data_ptr", NULL, "slice"); | |
1367 | len = value_struct_elt (&lhs, NULL, "length", NULL, "slice"); | |
1368 | low_bound = 0; | |
1369 | high_bound = value_as_long (len); | |
1370 | } | |
78134374 | 1371 | else if (type->code () == TYPE_CODE_PTR) |
42d94011 MG |
1372 | { |
1373 | base = lhs; | |
1374 | low_bound = 0; | |
1375 | high_bound = LONGEST_MAX; | |
1376 | } | |
c44af4eb TT |
1377 | else |
1378 | error (_("Cannot subscript non-array type")); | |
1379 | ||
1380 | if (want_slice | |
1381 | && (kind == BOTH_BOUND_DEFAULT || kind == LOW_BOUND_DEFAULT)) | |
1382 | low = low_bound; | |
1383 | if (low < 0) | |
1384 | error (_("Index less than zero")); | |
1385 | if (low > high_bound) | |
1386 | error (_("Index greater than length")); | |
1387 | ||
1388 | result = value_subscript (base, low); | |
1389 | } | |
1390 | ||
1391 | if (for_addr) | |
1392 | { | |
1393 | if (want_slice) | |
1394 | { | |
1395 | struct type *usize, *slice; | |
1396 | CORE_ADDR addr; | |
1397 | struct value *addrval, *tem; | |
1398 | ||
1399 | if (kind == BOTH_BOUND_DEFAULT || kind == HIGH_BOUND_DEFAULT) | |
1400 | high = high_bound; | |
1401 | if (high < 0) | |
1402 | error (_("High index less than zero")); | |
1403 | if (low > high) | |
1404 | error (_("Low index greater than high index")); | |
1405 | if (high > high_bound) | |
1406 | error (_("High index greater than length")); | |
1407 | ||
1408 | usize = language_lookup_primitive_type (exp->language_defn, | |
1409 | exp->gdbarch, | |
1410 | "usize"); | |
45320ffa TT |
1411 | const char *new_name = ((type != nullptr |
1412 | && rust_slice_type_p (type)) | |
7d93a1e0 | 1413 | ? type->name () : "&[*gdb*]"); |
45320ffa TT |
1414 | |
1415 | slice = rust_slice_type (new_name, value_type (result), usize); | |
c44af4eb TT |
1416 | |
1417 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (slice)); | |
1418 | addr = value_as_long (addrval); | |
1419 | tem = value_at_lazy (slice, addr); | |
1420 | ||
1421 | value_assign (value_field (tem, 0), value_addr (result)); | |
1422 | value_assign (value_field (tem, 1), | |
1423 | value_from_longest (usize, high - low)); | |
1424 | ||
1425 | result = value_at_lazy (slice, addr); | |
1426 | } | |
1427 | else | |
1428 | result = value_addr (result); | |
1429 | } | |
1430 | ||
1431 | return result; | |
1432 | } | |
1433 | ||
1434 | /* evaluate_exp implementation for Rust. */ | |
1435 | ||
1436 | static struct value * | |
1437 | rust_evaluate_subexp (struct type *expect_type, struct expression *exp, | |
1438 | int *pos, enum noside noside) | |
1439 | { | |
1440 | struct value *result; | |
1441 | ||
1442 | switch (exp->elts[*pos].opcode) | |
1443 | { | |
71a3c369 TT |
1444 | case UNOP_IND: |
1445 | { | |
1446 | if (noside != EVAL_NORMAL) | |
1447 | result = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
1448 | else | |
1449 | { | |
1450 | ++*pos; | |
1451 | struct value *value = evaluate_subexp (expect_type, exp, pos, | |
1452 | noside); | |
1453 | ||
1454 | struct value *trait_ptr = rust_get_trait_object_pointer (value); | |
1455 | if (trait_ptr != NULL) | |
1456 | value = trait_ptr; | |
1457 | ||
1458 | result = value_ind (value); | |
1459 | } | |
1460 | } | |
1461 | break; | |
1462 | ||
c44af4eb TT |
1463 | case UNOP_COMPLEMENT: |
1464 | { | |
1465 | struct value *value; | |
1466 | ||
1467 | ++*pos; | |
1468 | value = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1469 | if (noside == EVAL_SKIP) | |
1470 | { | |
1471 | /* Preserving the type is enough. */ | |
1472 | return value; | |
1473 | } | |
78134374 | 1474 | if (value_type (value)->code () == TYPE_CODE_BOOL) |
c44af4eb TT |
1475 | result = value_from_longest (value_type (value), |
1476 | value_logical_not (value)); | |
1477 | else | |
1478 | result = value_complement (value); | |
1479 | } | |
1480 | break; | |
1481 | ||
1482 | case BINOP_SUBSCRIPT: | |
1483 | result = rust_subscript (exp, pos, noside, 0); | |
1484 | break; | |
1485 | ||
1486 | case OP_FUNCALL: | |
1487 | result = rust_evaluate_funcall (exp, pos, noside); | |
1488 | break; | |
1489 | ||
1490 | case OP_AGGREGATE: | |
1491 | { | |
1492 | int pc = (*pos)++; | |
1493 | struct type *type = exp->elts[pc + 1].type; | |
1494 | int arglen = longest_to_int (exp->elts[pc + 2].longconst); | |
1495 | int i; | |
1496 | CORE_ADDR addr = 0; | |
1497 | struct value *addrval = NULL; | |
1498 | ||
1499 | *pos += 3; | |
1500 | ||
1501 | if (noside == EVAL_NORMAL) | |
1502 | { | |
1503 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (type)); | |
1504 | addr = value_as_long (addrval); | |
1505 | result = value_at_lazy (type, addr); | |
1506 | } | |
1507 | ||
1508 | if (arglen > 0 && exp->elts[*pos].opcode == OP_OTHERS) | |
1509 | { | |
1510 | struct value *init; | |
1511 | ||
1512 | ++*pos; | |
1513 | init = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1514 | if (noside == EVAL_NORMAL) | |
1515 | { | |
1516 | /* This isn't quite right but will do for the time | |
1517 | being, seeing that we can't implement the Copy | |
1518 | trait anyway. */ | |
1519 | value_assign (result, init); | |
1520 | } | |
1521 | ||
1522 | --arglen; | |
1523 | } | |
1524 | ||
1525 | gdb_assert (arglen % 2 == 0); | |
1526 | for (i = 0; i < arglen; i += 2) | |
1527 | { | |
1528 | int len; | |
1529 | const char *fieldname; | |
1530 | struct value *value, *field; | |
1531 | ||
1532 | gdb_assert (exp->elts[*pos].opcode == OP_NAME); | |
1533 | ++*pos; | |
1534 | len = longest_to_int (exp->elts[*pos].longconst); | |
1535 | ++*pos; | |
1536 | fieldname = &exp->elts[*pos].string; | |
1537 | *pos += 2 + BYTES_TO_EXP_ELEM (len + 1); | |
1538 | ||
1539 | value = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1540 | if (noside == EVAL_NORMAL) | |
1541 | { | |
1542 | field = value_struct_elt (&result, NULL, fieldname, NULL, | |
1543 | "structure"); | |
1544 | value_assign (field, value); | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | if (noside == EVAL_SKIP) | |
1549 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, | |
1550 | 1); | |
1551 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1552 | result = allocate_value (type); | |
1553 | else | |
1554 | result = value_at_lazy (type, addr); | |
1555 | } | |
1556 | break; | |
1557 | ||
1558 | case OP_RUST_ARRAY: | |
1559 | { | |
8d49165d | 1560 | (*pos)++; |
c44af4eb TT |
1561 | int copies; |
1562 | struct value *elt; | |
1563 | struct value *ncopies; | |
1564 | ||
1565 | elt = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1566 | ncopies = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1567 | copies = value_as_long (ncopies); | |
1568 | if (copies < 0) | |
1569 | error (_("Array with negative number of elements")); | |
1570 | ||
1571 | if (noside == EVAL_NORMAL) | |
1572 | { | |
c44af4eb | 1573 | int i; |
ab8b80a8 | 1574 | std::vector<struct value *> eltvec (copies); |
c44af4eb TT |
1575 | |
1576 | for (i = 0; i < copies; ++i) | |
1577 | eltvec[i] = elt; | |
ab8b80a8 | 1578 | result = value_array (0, copies - 1, eltvec.data ()); |
c44af4eb TT |
1579 | } |
1580 | else | |
1581 | { | |
1582 | struct type *arraytype | |
1583 | = lookup_array_range_type (value_type (elt), 0, copies - 1); | |
1584 | result = allocate_value (arraytype); | |
1585 | } | |
1586 | } | |
1587 | break; | |
1588 | ||
1589 | case STRUCTOP_ANONYMOUS: | |
1590 | { | |
1591 | /* Anonymous field access, i.e. foo.1. */ | |
1592 | struct value *lhs; | |
1593 | int pc, field_number, nfields; | |
8d49165d | 1594 | struct type *type; |
c44af4eb TT |
1595 | |
1596 | pc = (*pos)++; | |
1597 | field_number = longest_to_int (exp->elts[pc + 1].longconst); | |
1598 | (*pos) += 2; | |
1599 | lhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1600 | ||
1601 | type = value_type (lhs); | |
c9317f21 | 1602 | |
78134374 | 1603 | if (type->code () == TYPE_CODE_STRUCT) |
c9317f21 TT |
1604 | { |
1605 | struct type *outer_type = NULL; | |
1606 | ||
1607 | if (rust_enum_p (type)) | |
c44af4eb | 1608 | { |
9c6a1327 TT |
1609 | gdb::array_view<const gdb_byte> view (value_contents (lhs), |
1610 | TYPE_LENGTH (type)); | |
1611 | type = resolve_dynamic_type (type, view, value_address (lhs)); | |
1612 | ||
098b2108 TT |
1613 | if (rust_empty_enum_p (type)) |
1614 | error (_("Cannot access field %d of empty enum %s"), | |
7d93a1e0 | 1615 | field_number, type->name ()); |
098b2108 | 1616 | |
9c6a1327 TT |
1617 | int fieldno = rust_enum_variant (type); |
1618 | lhs = value_primitive_field (lhs, 0, fieldno, type); | |
c9317f21 TT |
1619 | outer_type = type; |
1620 | type = value_type (lhs); | |
c44af4eb TT |
1621 | } |
1622 | ||
c44af4eb | 1623 | /* Tuples and tuple structs */ |
1f704f76 | 1624 | nfields = type->num_fields (); |
c44af4eb TT |
1625 | |
1626 | if (field_number >= nfields || field_number < 0) | |
c9317f21 TT |
1627 | { |
1628 | if (outer_type != NULL) | |
1629 | error(_("Cannot access field %d of variant %s::%s, " | |
1630 | "there are only %d fields"), | |
7d93a1e0 SM |
1631 | field_number, outer_type->name (), |
1632 | rust_last_path_segment (type->name ()), | |
c9317f21 TT |
1633 | nfields); |
1634 | else | |
1635 | error(_("Cannot access field %d of %s, " | |
1636 | "there are only %d fields"), | |
7d93a1e0 | 1637 | field_number, type->name (), nfields); |
c9317f21 | 1638 | } |
c44af4eb TT |
1639 | |
1640 | /* Tuples are tuple structs too. */ | |
1641 | if (!rust_tuple_struct_type_p (type)) | |
c9317f21 TT |
1642 | { |
1643 | if (outer_type != NULL) | |
1644 | error(_("Variant %s::%s is not a tuple variant"), | |
7d93a1e0 SM |
1645 | outer_type->name (), |
1646 | rust_last_path_segment (type->name ())); | |
c9317f21 TT |
1647 | else |
1648 | error(_("Attempting to access anonymous field %d " | |
1649 | "of %s, which is not a tuple, tuple struct, or " | |
1650 | "tuple-like variant"), | |
7d93a1e0 | 1651 | field_number, type->name ()); |
c9317f21 | 1652 | } |
c44af4eb TT |
1653 | |
1654 | result = value_primitive_field (lhs, 0, field_number, type); | |
1655 | } | |
1656 | else | |
1657 | error(_("Anonymous field access is only allowed on tuples, \ | |
1658 | tuple structs, and tuple-like enum variants")); | |
1659 | } | |
1660 | break; | |
1661 | ||
1662 | case STRUCTOP_STRUCT: | |
1663 | { | |
6830f270 | 1664 | struct value *lhs; |
c44af4eb TT |
1665 | struct type *type; |
1666 | int tem, pc; | |
1667 | ||
1668 | pc = (*pos)++; | |
1669 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
1670 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
1671 | lhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1672 | ||
6830f270 | 1673 | const char *field_name = &exp->elts[pc + 2].string; |
c44af4eb | 1674 | type = value_type (lhs); |
78134374 | 1675 | if (type->code () == TYPE_CODE_STRUCT && rust_enum_p (type)) |
c44af4eb | 1676 | { |
9c6a1327 TT |
1677 | gdb::array_view<const gdb_byte> view (value_contents (lhs), |
1678 | TYPE_LENGTH (type)); | |
1679 | type = resolve_dynamic_type (type, view, value_address (lhs)); | |
1680 | ||
098b2108 TT |
1681 | if (rust_empty_enum_p (type)) |
1682 | error (_("Cannot access field %s of empty enum %s"), | |
7d93a1e0 | 1683 | field_name, type->name ()); |
098b2108 | 1684 | |
9c6a1327 TT |
1685 | int fieldno = rust_enum_variant (type); |
1686 | lhs = value_primitive_field (lhs, 0, fieldno, type); | |
c9317f21 TT |
1687 | |
1688 | struct type *outer_type = type; | |
1689 | type = value_type (lhs); | |
1690 | if (rust_tuple_type_p (type) || rust_tuple_struct_type_p (type)) | |
4a3fe98f | 1691 | error (_("Attempting to access named field %s of tuple " |
c9317f21 | 1692 | "variant %s::%s, which has only anonymous fields"), |
7d93a1e0 SM |
1693 | field_name, outer_type->name (), |
1694 | rust_last_path_segment (type->name ())); | |
c9317f21 | 1695 | |
a70b8144 | 1696 | try |
c44af4eb | 1697 | { |
c9317f21 TT |
1698 | result = value_struct_elt (&lhs, NULL, field_name, |
1699 | NULL, "structure"); | |
c44af4eb | 1700 | } |
230d2906 | 1701 | catch (const gdb_exception_error &except) |
c9317f21 TT |
1702 | { |
1703 | error (_("Could not find field %s of struct variant %s::%s"), | |
7d93a1e0 SM |
1704 | field_name, outer_type->name (), |
1705 | rust_last_path_segment (type->name ())); | |
c9317f21 | 1706 | } |
c44af4eb TT |
1707 | } |
1708 | else | |
c9317f21 TT |
1709 | result = value_struct_elt (&lhs, NULL, field_name, NULL, "structure"); |
1710 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1711 | result = value_zero (value_type (result), VALUE_LVAL (result)); | |
c44af4eb TT |
1712 | } |
1713 | break; | |
1714 | ||
01739a3b | 1715 | case OP_RANGE: |
c44af4eb TT |
1716 | result = rust_range (exp, pos, noside); |
1717 | break; | |
1718 | ||
1719 | case UNOP_ADDR: | |
1720 | /* We might have &array[range], in which case we need to make a | |
1721 | slice. */ | |
1722 | if (exp->elts[*pos + 1].opcode == BINOP_SUBSCRIPT) | |
1723 | { | |
1724 | ++*pos; | |
1725 | result = rust_subscript (exp, pos, noside, 1); | |
1726 | break; | |
1727 | } | |
1728 | /* Fall through. */ | |
1729 | default: | |
1730 | result = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
1731 | break; | |
1732 | } | |
1733 | ||
1734 | return result; | |
1735 | } | |
1736 | ||
1737 | /* operator_length implementation for Rust. */ | |
1738 | ||
1739 | static void | |
1740 | rust_operator_length (const struct expression *exp, int pc, int *oplenp, | |
1741 | int *argsp) | |
1742 | { | |
1743 | int oplen = 1; | |
1744 | int args = 0; | |
1745 | ||
1746 | switch (exp->elts[pc - 1].opcode) | |
1747 | { | |
1748 | case OP_AGGREGATE: | |
1749 | /* We handle aggregate as a type and argument count. The first | |
1750 | argument might be OP_OTHERS. After that the arguments | |
1751 | alternate: first an OP_NAME, then an expression. */ | |
1752 | oplen = 4; | |
1753 | args = longest_to_int (exp->elts[pc - 2].longconst); | |
1754 | break; | |
1755 | ||
1756 | case OP_OTHERS: | |
1757 | oplen = 1; | |
1758 | args = 1; | |
1759 | break; | |
1760 | ||
1761 | case STRUCTOP_ANONYMOUS: | |
1762 | oplen = 3; | |
1763 | args = 1; | |
1764 | break; | |
1765 | ||
1766 | case OP_RUST_ARRAY: | |
1767 | oplen = 1; | |
1768 | args = 2; | |
1769 | break; | |
1770 | ||
1771 | default: | |
1772 | operator_length_standard (exp, pc, oplenp, argsp); | |
1773 | return; | |
1774 | } | |
1775 | ||
1776 | *oplenp = oplen; | |
1777 | *argsp = args; | |
1778 | } | |
1779 | ||
1780 | /* op_name implementation for Rust. */ | |
1781 | ||
a121b7c1 | 1782 | static const char * |
c44af4eb TT |
1783 | rust_op_name (enum exp_opcode opcode) |
1784 | { | |
1785 | switch (opcode) | |
1786 | { | |
1787 | case OP_AGGREGATE: | |
1788 | return "OP_AGGREGATE"; | |
1789 | case OP_OTHERS: | |
1790 | return "OP_OTHERS"; | |
1791 | default: | |
1792 | return op_name_standard (opcode); | |
1793 | } | |
1794 | } | |
1795 | ||
1796 | /* dump_subexp_body implementation for Rust. */ | |
1797 | ||
1798 | static int | |
1799 | rust_dump_subexp_body (struct expression *exp, struct ui_file *stream, | |
1800 | int elt) | |
1801 | { | |
1802 | switch (exp->elts[elt].opcode) | |
1803 | { | |
1804 | case OP_AGGREGATE: | |
1805 | { | |
1806 | int length = longest_to_int (exp->elts[elt + 2].longconst); | |
1807 | int i; | |
1808 | ||
1809 | fprintf_filtered (stream, "Type @"); | |
1810 | gdb_print_host_address (exp->elts[elt + 1].type, stream); | |
1811 | fprintf_filtered (stream, " ("); | |
1812 | type_print (exp->elts[elt + 1].type, NULL, stream, 0); | |
1813 | fprintf_filtered (stream, "), length %d", length); | |
1814 | ||
1815 | elt += 4; | |
1816 | for (i = 0; i < length; ++i) | |
1817 | elt = dump_subexp (exp, stream, elt); | |
1818 | } | |
1819 | break; | |
1820 | ||
1821 | case OP_STRING: | |
1822 | case OP_NAME: | |
1823 | { | |
1824 | LONGEST len = exp->elts[elt + 1].longconst; | |
1825 | ||
1826 | fprintf_filtered (stream, "%s: %s", | |
1827 | (exp->elts[elt].opcode == OP_STRING | |
1828 | ? "string" : "name"), | |
1829 | &exp->elts[elt + 2].string); | |
1830 | elt += 4 + BYTES_TO_EXP_ELEM (len + 1); | |
1831 | } | |
1832 | break; | |
1833 | ||
1834 | case OP_OTHERS: | |
1835 | elt = dump_subexp (exp, stream, elt + 1); | |
1836 | break; | |
1837 | ||
1838 | case STRUCTOP_ANONYMOUS: | |
1839 | { | |
1840 | int field_number; | |
1841 | ||
68f2f2e3 | 1842 | field_number = longest_to_int (exp->elts[elt + 1].longconst); |
c44af4eb TT |
1843 | |
1844 | fprintf_filtered (stream, "Field number: %d", field_number); | |
68f2f2e3 | 1845 | elt = dump_subexp (exp, stream, elt + 3); |
c44af4eb TT |
1846 | } |
1847 | break; | |
1848 | ||
1849 | case OP_RUST_ARRAY: | |
68f2f2e3 | 1850 | ++elt; |
c44af4eb TT |
1851 | break; |
1852 | ||
1853 | default: | |
1854 | elt = dump_subexp_body_standard (exp, stream, elt); | |
1855 | break; | |
1856 | } | |
1857 | ||
1858 | return elt; | |
1859 | } | |
1860 | ||
1861 | /* print_subexp implementation for Rust. */ | |
1862 | ||
1863 | static void | |
1864 | rust_print_subexp (struct expression *exp, int *pos, struct ui_file *stream, | |
1865 | enum precedence prec) | |
1866 | { | |
1867 | switch (exp->elts[*pos].opcode) | |
1868 | { | |
1869 | case OP_AGGREGATE: | |
1870 | { | |
1871 | int length = longest_to_int (exp->elts[*pos + 2].longconst); | |
1872 | int i; | |
1873 | ||
1874 | type_print (exp->elts[*pos + 1].type, "", stream, 0); | |
1875 | fputs_filtered (" { ", stream); | |
1876 | ||
1877 | *pos += 4; | |
1878 | for (i = 0; i < length; ++i) | |
1879 | { | |
1880 | rust_print_subexp (exp, pos, stream, prec); | |
1881 | fputs_filtered (", ", stream); | |
1882 | } | |
1883 | fputs_filtered (" }", stream); | |
1884 | } | |
1885 | break; | |
1886 | ||
1887 | case OP_NAME: | |
1888 | { | |
1889 | LONGEST len = exp->elts[*pos + 1].longconst; | |
1890 | ||
1891 | fputs_filtered (&exp->elts[*pos + 2].string, stream); | |
1892 | *pos += 4 + BYTES_TO_EXP_ELEM (len + 1); | |
1893 | } | |
1894 | break; | |
1895 | ||
1896 | case OP_OTHERS: | |
1897 | { | |
1898 | fputs_filtered ("<<others>> (", stream); | |
1899 | ++*pos; | |
1900 | rust_print_subexp (exp, pos, stream, prec); | |
1901 | fputs_filtered (")", stream); | |
1902 | } | |
1903 | break; | |
1904 | ||
1905 | case STRUCTOP_ANONYMOUS: | |
1906 | { | |
1907 | int tem = longest_to_int (exp->elts[*pos + 1].longconst); | |
1908 | ||
1909 | (*pos) += 3; | |
1910 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
1911 | fprintf_filtered (stream, ".%d", tem); | |
1912 | } | |
256afbc2 | 1913 | break; |
c44af4eb TT |
1914 | |
1915 | case OP_RUST_ARRAY: | |
1916 | ++*pos; | |
1917 | fprintf_filtered (stream, "["); | |
1918 | rust_print_subexp (exp, pos, stream, prec); | |
1919 | fprintf_filtered (stream, "; "); | |
1920 | rust_print_subexp (exp, pos, stream, prec); | |
1921 | fprintf_filtered (stream, "]"); | |
1922 | break; | |
1923 | ||
1924 | default: | |
1925 | print_subexp_standard (exp, pos, stream, prec); | |
1926 | break; | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | /* operator_check implementation for Rust. */ | |
1931 | ||
1932 | static int | |
1933 | rust_operator_check (struct expression *exp, int pos, | |
1934 | int (*objfile_func) (struct objfile *objfile, | |
1935 | void *data), | |
1936 | void *data) | |
1937 | { | |
1938 | switch (exp->elts[pos].opcode) | |
1939 | { | |
1940 | case OP_AGGREGATE: | |
1941 | { | |
1942 | struct type *type = exp->elts[pos + 1].type; | |
1943 | struct objfile *objfile = TYPE_OBJFILE (type); | |
1944 | ||
1945 | if (objfile != NULL && (*objfile_func) (objfile, data)) | |
1946 | return 1; | |
1947 | } | |
1948 | break; | |
1949 | ||
1950 | case OP_OTHERS: | |
1951 | case OP_NAME: | |
1952 | case OP_RUST_ARRAY: | |
1953 | break; | |
1954 | ||
1955 | default: | |
1956 | return operator_check_standard (exp, pos, objfile_func, data); | |
1957 | } | |
1958 | ||
1959 | return 0; | |
1960 | } | |
1961 | ||
1962 | \f | |
1963 | ||
1964 | /* Implementation of la_lookup_symbol_nonlocal for Rust. */ | |
1965 | ||
1966 | static struct block_symbol | |
1967 | rust_lookup_symbol_nonlocal (const struct language_defn *langdef, | |
1968 | const char *name, | |
1969 | const struct block *block, | |
1970 | const domain_enum domain) | |
1971 | { | |
6640a367 | 1972 | struct block_symbol result = {}; |
c44af4eb TT |
1973 | |
1974 | if (symbol_lookup_debug) | |
1975 | { | |
1976 | fprintf_unfiltered (gdb_stdlog, | |
1977 | "rust_lookup_symbol_non_local" | |
1978 | " (%s, %s (scope %s), %s)\n", | |
1979 | name, host_address_to_string (block), | |
1980 | block_scope (block), domain_name (domain)); | |
1981 | } | |
1982 | ||
1983 | /* Look up bare names in the block's scope. */ | |
fcfcc376 | 1984 | std::string scopedname; |
c44af4eb TT |
1985 | if (name[cp_find_first_component (name)] == '\0') |
1986 | { | |
1987 | const char *scope = block_scope (block); | |
1988 | ||
1989 | if (scope[0] != '\0') | |
1990 | { | |
fcfcc376 TT |
1991 | scopedname = std::string (scope) + "::" + name; |
1992 | name = scopedname.c_str (); | |
c44af4eb | 1993 | } |
fcfcc376 TT |
1994 | else |
1995 | name = NULL; | |
1996 | } | |
1997 | ||
1998 | if (name != NULL) | |
1999 | { | |
2000 | result = lookup_symbol_in_static_block (name, block, domain); | |
2001 | if (result.symbol == NULL) | |
2002 | result = lookup_global_symbol (name, block, domain); | |
c44af4eb TT |
2003 | } |
2004 | return result; | |
2005 | } | |
2006 | ||
2007 | \f | |
2008 | ||
43cc5389 TT |
2009 | /* la_watch_location_expression for Rust. */ |
2010 | ||
2011 | static gdb::unique_xmalloc_ptr<char> | |
2012 | rust_watch_location_expression (struct type *type, CORE_ADDR addr) | |
2013 | { | |
2014 | type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type))); | |
2015 | std::string name = type_to_string (type); | |
2016 | return gdb::unique_xmalloc_ptr<char> | |
2017 | (xstrprintf ("*(%s as *mut %s)", core_addr_to_string (addr), | |
2018 | name.c_str ())); | |
2019 | } | |
2020 | ||
2021 | \f | |
2022 | ||
c44af4eb TT |
2023 | static const struct exp_descriptor exp_descriptor_rust = |
2024 | { | |
2025 | rust_print_subexp, | |
2026 | rust_operator_length, | |
2027 | rust_operator_check, | |
2028 | rust_op_name, | |
2029 | rust_dump_subexp_body, | |
2030 | rust_evaluate_subexp | |
2031 | }; | |
2032 | ||
56618e20 TT |
2033 | static const char *rust_extensions[] = |
2034 | { | |
2035 | ".rs", NULL | |
2036 | }; | |
2037 | ||
0874fd07 AB |
2038 | /* Constant data representing the Rust language. */ |
2039 | ||
2040 | extern const struct language_data rust_language_data = | |
c44af4eb TT |
2041 | { |
2042 | "rust", | |
2043 | "Rust", | |
2044 | language_rust, | |
2045 | range_check_on, | |
2046 | case_sensitive_on, | |
2047 | array_row_major, | |
2048 | macro_expansion_no, | |
56618e20 | 2049 | rust_extensions, |
c44af4eb TT |
2050 | &exp_descriptor_rust, |
2051 | rust_parse, | |
c44af4eb TT |
2052 | null_post_parser, |
2053 | rust_printchar, /* Print a character constant */ | |
2054 | rust_printstr, /* Function to print string constant */ | |
2055 | rust_emitchar, /* Print a single char */ | |
c44af4eb | 2056 | rust_print_typedef, /* Print a typedef using appropriate syntax */ |
5f56f7cb | 2057 | rust_value_print_inner, /* la_value_print_inner */ |
c44af4eb | 2058 | c_value_print, /* Print a top-level value */ |
c44af4eb | 2059 | NULL, /* name_of_this */ |
59cc4834 | 2060 | false, /* la_store_sym_names_in_linkage_form_p */ |
c44af4eb | 2061 | rust_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
c44af4eb TT |
2062 | NULL, /* Language specific |
2063 | class_name_from_physname */ | |
2064 | c_op_print_tab, /* expression operators for printing */ | |
2065 | 1, /* c-style arrays */ | |
2066 | 0, /* String lower bound */ | |
2067 | default_word_break_characters, | |
eb3ff9a5 | 2068 | default_collect_symbol_completion_matches, |
43cc5389 | 2069 | rust_watch_location_expression, |
b5ec771e | 2070 | NULL, /* la_get_symbol_name_matcher */ |
c44af4eb TT |
2071 | &default_varobj_ops, |
2072 | NULL, | |
4be290b2 | 2073 | rust_is_string_type_p, |
721b08c6 | 2074 | "{...}" /* la_struct_too_deep_ellipsis */ |
c44af4eb | 2075 | }; |
0874fd07 AB |
2076 | |
2077 | /* Class representing the Rust language. */ | |
2078 | ||
2079 | class rust_language : public language_defn | |
2080 | { | |
2081 | public: | |
2082 | rust_language () | |
2083 | : language_defn (language_rust, rust_language_data) | |
2084 | { /* Nothing. */ } | |
1fb314aa AB |
2085 | |
2086 | /* See language.h. */ | |
2087 | void language_arch_info (struct gdbarch *gdbarch, | |
2088 | struct language_arch_info *lai) const override | |
2089 | { | |
2090 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
2091 | ||
2092 | struct type **types | |
2093 | = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_rust_primitive_types + 1, | |
2094 | struct type *); | |
2095 | ||
2096 | types[rust_primitive_bool] = arch_boolean_type (gdbarch, 8, 1, "bool"); | |
2097 | types[rust_primitive_char] = arch_character_type (gdbarch, 32, 1, "char"); | |
2098 | types[rust_primitive_i8] = arch_integer_type (gdbarch, 8, 0, "i8"); | |
2099 | types[rust_primitive_u8] = arch_integer_type (gdbarch, 8, 1, "u8"); | |
2100 | types[rust_primitive_i16] = arch_integer_type (gdbarch, 16, 0, "i16"); | |
2101 | types[rust_primitive_u16] = arch_integer_type (gdbarch, 16, 1, "u16"); | |
2102 | types[rust_primitive_i32] = arch_integer_type (gdbarch, 32, 0, "i32"); | |
2103 | types[rust_primitive_u32] = arch_integer_type (gdbarch, 32, 1, "u32"); | |
2104 | types[rust_primitive_i64] = arch_integer_type (gdbarch, 64, 0, "i64"); | |
2105 | types[rust_primitive_u64] = arch_integer_type (gdbarch, 64, 1, "u64"); | |
2106 | ||
2107 | unsigned int length = 8 * TYPE_LENGTH (builtin->builtin_data_ptr); | |
2108 | types[rust_primitive_isize] = arch_integer_type (gdbarch, length, 0, "isize"); | |
2109 | types[rust_primitive_usize] = arch_integer_type (gdbarch, length, 1, "usize"); | |
2110 | ||
2111 | types[rust_primitive_f32] = arch_float_type (gdbarch, 32, "f32", | |
2112 | floatformats_ieee_single); | |
2113 | types[rust_primitive_f64] = arch_float_type (gdbarch, 64, "f64", | |
2114 | floatformats_ieee_double); | |
2115 | ||
2116 | types[rust_primitive_unit] = arch_integer_type (gdbarch, 0, 1, "()"); | |
2117 | ||
2118 | struct type *tem = make_cv_type (1, 0, types[rust_primitive_u8], NULL); | |
2119 | types[rust_primitive_str] = rust_slice_type ("&str", tem, | |
2120 | types[rust_primitive_usize]); | |
2121 | ||
2122 | lai->primitive_type_vector = types; | |
2123 | lai->bool_type_default = types[rust_primitive_bool]; | |
2124 | lai->string_char_type = types[rust_primitive_u8]; | |
2125 | } | |
6f827019 AB |
2126 | |
2127 | /* See language.h. */ | |
2128 | bool sniff_from_mangled_name (const char *mangled, | |
2129 | char **demangled) const override | |
2130 | { | |
2131 | *demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI); | |
2132 | return *demangled != NULL; | |
2133 | } | |
fbfb0a46 AB |
2134 | |
2135 | /* See language.h. */ | |
2136 | ||
0a50df5d AB |
2137 | char *demangle (const char *mangled, int options) const override |
2138 | { | |
2139 | return gdb_demangle (mangled, options); | |
2140 | } | |
2141 | ||
2142 | /* See language.h. */ | |
2143 | ||
fbfb0a46 AB |
2144 | void print_type (struct type *type, const char *varstring, |
2145 | struct ui_file *stream, int show, int level, | |
2146 | const struct type_print_options *flags) const override | |
2147 | { | |
2148 | print_offset_data podata; | |
2149 | rust_internal_print_type (type, varstring, stream, show, level, | |
2150 | flags, false, &podata); | |
2151 | } | |
0874fd07 AB |
2152 | }; |
2153 | ||
2154 | /* Single instance of the Rust language class. */ | |
2155 | ||
2156 | static rust_language rust_language_defn; |